Alert archive / Texas / Tornado Watches in 2007
Tornado Watch 182
The Storm Prediction Center issued this tornado watch at Apr 24, 2007, 10:35 PM CDT for 7 counties in Arkansas; 43 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2007, 10:35 PM CDT (03:35 UTC)
- Expired
- Apr 25, 2007, 4:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 70 kt
All 50 counties
Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Sevier County, AR, Anderson County, TX, Bell County, TX, Bosque County, TX, Bowie County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Collin County, TX, Coryell County, TX, Delta County, TX, Ellis County, TX, Falls County, TX, Fannin County, TX, Franklin County, TX, Freestone County, TX, Gregg County, TX, Hamilton County, TX, Harrison County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Hunt County, TX, Kaufman County, TX, Lamar County, TX, Lampasas County, TX, Leon County, TX, Limestone County, TX, Marion County, TX, McLennan County, TX, Milam County, TX, Morris County, TX, Nacogdoches County, TX, Navarro County, TX, Rains County, TX, Red River County, TX, Robertson County, TX, Rockwall County, TX, Rusk County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 161 km from the middle of the area, began a volume at 03:35 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 50%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 3:19 AM CDT | Flash Flood Warning | SHV | Smith | 4 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 3.6 hours before the alert went out and 159 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1510 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 701 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 154 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 5.2
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 250336
SEL2
SPC WW 250336
ARZ000-OKZ000-TXZ000-250900-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 182
NWS STORM PREDICTION CENTER NORMAN OK
1035 PM CDT TUE APR 24 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHWESTERN ARKANSAS
EXTREME SOUTHEASTERN OKLAHOMA
CENTRAL THROUGH NORTHEAST TEXAS
EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1035 PM
UNTIL 400 AM CDT.
TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH OF TEXARKANA
ARKANSAS TO 20 MILES SOUTH SOUTHEAST OF TEMPLE TEXAS. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU2).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.
OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 176. WATCH NUMBER 176 WILL NOT BE IN EFFECT AFTER
1035 PM CDT. CONTINUE...WW 180...WW 181...
DISCUSSION...SERIES OF SVR TSTMS -- INCLUDING A FEW BOW ECHOES --
WILL PROCEED EWD ACROSS N-CENTRAL/NERN TX...MCCURTAIN COUNTY OK AND
SWRN AR WITH PRIMARY THREAT BEING SVR GUSTS. IN ADDITION TO WIND
THREAT...VERTICAL SHEAR PROFILES ARE FAVORABLE FOR A FEW TORNADIC
MESOVORTICES OCCURRING WITH BOWS/LEWPS.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 25040.
...EDWARDSSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 7:33 PM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Clark, Crawford, Franklin, Hempstead and 15 more | 117 min |
| Apr 24, 9:10 PM CDT | Tornado Watch | SPC | Baxter, Boone, Clark, Cleburne, Conway, Dallas and 26 more | 4 hr |
| Apr 24, 10:05 PM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Crittenden, Cross, Greene, Jackson and 4 more | 85 min |
| Apr 24, 10:07 PM CDT | Mesoscale Discussion | SPC | Little River, Miller, Sevier | 83 min |
| Apr 24, 10:53 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Craighead, Greene, Lawrence, Mississippi, Poinsett and 1 more | 3 hr |
| Apr 24, 11:58 PM CDT | Mesoscale Discussion | SPC | Clark, Dallas, Garland, Grant, Hempstead, Hot Spring and 15 more | 92 min |
| Apr 25, 12:45 AM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Greene, Lawrence, Mississippi, Poinsett and 2 more | 90 min |
| Apr 25, 2:10 AM CDT | Mesoscale Discussion | SPC | Columbia, Union | 65 min |
| Apr 25, 12:30 PM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Washington | 60 min |
| Apr 25, 1:11 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Carroll | 8 hr |
| Apr 25, 2:46 PM CDT | Mesoscale Discussion | SPC | Baxter, Boone, Conway, Crawford, Franklin, Johnson and 12 more | 59 min |
| Apr 25, 3:38 PM CDT | Tornado Watch | SPC | Baxter, Benton, Boone, Carroll, Cleburne, Conway and 25 more | 6 hr |
| Apr 25, 6:15 PM CDT | Mesoscale Discussion | SPC | Clark, Columbia, Lafayette, Nevada, Ouachita | 90 min |
| Apr 25, 6:38 PM CDT | Mesoscale Discussion | SPC | Baxter, Boone, Cleburne, Conway, Faulkner, Fulton and 17 more | 97 min |
| Apr 24, 10:53 PM CDT | Tornado Watch | SPC | Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 28 more | 7 hr |
| Apr 25, 1:14 AM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bastrop, Bee, Bexar, Blanco and 35 more | 91 min |
| Apr 25, 1:40 AM CDT | Tornado Watch | SPC | Aransas, Austin, Bee, Brazoria, Brazos, Burleson and 30 more | 7 hr |
| Apr 25, 4:29 AM CDT | Mesoscale Discussion | SPC | Angelina, Aransas, Austin, Bee, Brazoria, Brazos and 35 more | 91 min |
| Apr 25, 7:36 AM CDT | Mesoscale Discussion | SPC | Aransas, Austin, Bee, Brazoria, Calhoun, Chambers and 28 more | 84 min |
| Apr 25, 9:00 AM CDT | Mesoscale Discussion | SPC | Brazoria, Chambers, Galveston, Hardin, Harris, Jasper and 9 more | 60 min |
| Apr 25, 9:13 AM CDT | Tornado Watch | SPC | Aransas, Brazoria, Calhoun, Chambers, Fort Bend, Galveston and 8 more | 8 hr |
| Apr 25, 3:05 PM CDT | Mesoscale Discussion | SPC | Galveston | 55 min |
Nearby
Tornado Watches in Texas, 2007Tornado Watches in Arkansas, 2007Every tornado watch in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.